Method of making sheet metal staples



H. s. HELLER 7 1,998,991

METHOD OF MAKING SHEET METAL STAPLES April 23, 1935.

Filed Jan. 23, 1935 FIG-'4 Z i I Y V M i\ \mx F lG.-3

INVENTOR BY HAROLD 5. H ELLER ATTO Y5 Patented Apr. 23, 1935 METHOD OF MAKING SHEET METAL STAPLES Harold s. Kellen, Cleveland, Ohio, asslgnor to corporation oi Ohio The J. C. Ulmer Company, Cleveland, Ohio, a

Application January 23, 1935, Serial No. 3,012

2 Claims.

, provision of a simple and economical method making the present improved staple by merely changing, in a simple and inexpensive manner, sheet metal staples of plain or ordinary form to staples of the present improved form.

Further objects of the present invention, andfurther features thereof, will appear iromthefollowing description of said invention, reference being had to the accompanying drawing in which Fig. l is a perspective view of an adhesively connected strip of the present improved sheet metal staples: Figs. 2 and 3 are vertical sectional views of parts inter-connected by the use of the present improved staples; and Fig. 4 is an enlarged front view of a plain or ordinary sheet metal staple.

As shown in said drawing, the present improved sheet metal staple is of inverted U-shape, with generally parallel leg portions l and a generally flat connecting top portion 2. In order-to enable the leg portions of said staple to penetrate more easily the parts to be stapled or tacked, and to enable said staple to inter-connect such parts more secureLv, either with or without the use oi a backing anvil, the outer side edges of the free ends of the leg portions of said staple, but not the inner side edges thereof. are bevelled oil or tapered inwardly, as indicated at 3. As a result, the leg portions or the staple are caused to converge upon being driven into the parts to be stapled or tacked, with the consequent production of a more secure inter-connection of such parts.

In Fig. 2. a relatively thin part II is stapled or tacked to a relatively thick part ii, and the converging relationship of the leg portions of the staple is clearly shown. In Fig. 3, two relatively thin parts i2, it are inter-connected by the use of one of the present improved staples and the clinching eiiect provided by the staple, an eilect insured by the convergence of the leg portions thereof, is clearly shown. In inter-connecting the parts of Fig. 3, abacking anvil is, of course,

used.

In order to enable staples of the general character here shown to be conveniently merchandized and conveniently inserted into a stapling machine or tacker, the staples are arranged in strips of trough-like shape, such as shown in Fig.

1, with the leg and top portions of adjacent staples in abutting relation, suitable means be- 5 ing employed to maintain them in such strip form.

In the embodiment of the invention here illustrated, the staples are maintained in strip form by an adhesive film 5 suitably applied to the outer surfaces of the staples, said him being preferably transparent and oi such thickness and character that the adhesive connection of adjacent staples may be readily broken by'the staple driving means of the stapling machine or tacker in which the strip of staples is used.

Althoughindividual staplesol plain or ordinary iorm, such as shown in Fig. 4, may be changed or converted to the present improved form, by merely bevelling oil the outer side edges I of the free ends of the leg portions thereof, it is preferable to first arrange and adhesively or otherwise suitably secure such plain or ordinary staples in strip form, and to then bevel oil or taper inwardly the outer side edges of the free ends or the leg portions of the entire strip of staples, such bevelling or tapering being performed by suitable grinding means. In this way. uniformity of bevel or taper is insured, with obvious economy in the cost of such work.

While it is believed that the value and advantages oi the present invention will be readily apparent from the foregoing description" thereof, it is to be understood that said invention is not limited to what is herein described or illustrated but includes all such changes that all within the scopeoi what is claimed.

What I claim is:

1. The herein described method, which consists in arranging and securing plain sheet metal staples in strip form, with the leg and top portions of adjacent staples in abutting relation, and then bevelling oil or tapering inwardly the outer side edges but not the inner side edges of the tree ends or the leg portions of the entire strip of staples.

2. The herein described method, which consists in arranging and adhesively securing plain sheet metal staples in strip form, with the leg and top portions of adjacent staples in abutting relation, and then bevelling oil or tapering inwardly the outer side edges but not the inner side edges of the free ends of the leg portions oi the entire strip of staples.

,HAROLD 5. Hum 

